My experience with Killer Chrome (long with pics)
I didn't get even coverage on my rallye bezel. Covered at one angle caused too much at ajacent surfaces. I'M no painter though. Small pieces like armrest bases look fine.
In my opinion the perfect fiberglass bumpers would have cadium plated T bolts captured in boxes preset in the mold. Provides plenty of adjustment to compensate for slightly bent bumper brackets and a slick outer finish to boot.
Takes money to make money though. Who can afford produce such a mold ?